Answer:
A?
Step-by-step explanation:
Answer:
For angle B which is 50 degrees,
hypotenuse = AB =?
Adjacent = BC = 2 units......(given)
cos 50 = adjacent / hypotenuse
0.643 = 2 / AB. .....(as cos 50 = 0.643 approx)
AB * 0.643 = 2
AB = 2 / 0.643
AB = 3.11 units(approx)
Answer:
AB = CD = 3√5
Step-by-step explanation:
We use Pythagoras' Theorem.
AB² = CD² = 3²+6² = 9+36 = 9·(1+4) = 9·5
=> AB = CD = √(9·5) => AB = CD = 3√5
